terminate called after throwing an instance of 'std::bad_alloc'

[robezy]

Problem.

terminate called after throwing an instance of 'std::bad_alloc'
what(): St9bad_alloc
Aborted

My Program.

#include <iostream>
#include <vector>
#include <stack>

using namespace std;

int main()
{
        int vertices;
        int edges;
        int a,b;

        while(cin >> vertices)
        {
                cin >> edges;
                vector< vector<int> > adj_list(vertices);
                for(int i=0;i<edges;i++)
                {
                        cin >> a>> b;
                        adj_list[a].push_back(b);
                }

                for(int i=0;i<adj_list.size();i++)
                {
                        for(int j=0;j<adj_list[i].size();j++)
                                cout << adj_list[i][j] << " ";
                        cout << endl;
                }
        }
        return 0;
}

Sample Input

3
3
0 1
1 2
2 0
9
8
0 1
0 2
0 3
0 4
0 5
0 6
0 7
0

Program Output.

1
2
0
1 2 3 4 5 6 7 8








terminate called after throwing an instance of 'std::bad_alloc'
  what():  St9bad_alloc
Aborted

[kbw]

You're missing the 8th edge on your input data.